Issue №: 4(119)
The journal solves the problems of creation and improvement of machinery and technologies for agriculture: 131 - Applied Mechanics, 132 - Materials Science, 133 - Industrial Engineering, 141 - Power Engineering, Electrical Engineering and Electromechanics, 208 - Agricultural Engineering.
ADAPTIVE INFLUENCE OF PRESSURE CHANGE OF THE HYDRAULIC SYSTEM OF THE HYDRAULIC DRIVE
Svetlana Kravets – Assistant of the Department "Technological Processes and Equipment of Processing and Food Production" of Vinnytsia National Agrarian University (3 Sunny Street, Vinnytsia, 21008, Ukraine, email: swkravec2017@gmail.com, https://orcid.org/0000-0001-8296-1929).
The efficiency of hydrogenated machines of various technological purposes depends to a large extent on the temperature of the environment. Temperature is the main factor in the efficiency of the hydraulic drive, which changes the physical properties of the working fluid: viscosity, moisture content, gases and mechanical impurities, which determine its modulus of elasticity. Efficiency is significantly reduced both at low temperatures and at high temperatures. The high-temperature mode of the hydraulic drive reduces the technical and operational performance of hydraulic machines (construction and road, mountain, agricultural and other self-propelled machines). High temperature is one of the most important factors that intensively affect the aging of the working fluid. An increase in the temperature of the lubricant above 70° C leads to a decrease in the lubricating capacity and premature wear of the equipment, an increase in the leakage of the lubricant, a decrease in its viscosity, thermal destruction with the formation of tarry deposits on the internal surfaces of the hydraulic equipment. Intensive wear is observed due to a decrease in the lubricating capacity of the friction surfaces, a decrease volumetric efficiency of hydraulic machines, changes in the linear dimensions of heated elements, as a result, the accuracy of technological operations deteriorates and the resource of hydraulic equipment is significantly reduced. All this leads to a decrease in the parameters of productivity and reliability of machines. Hydrogenated machines operated at elevated temperatures require a number of measures to increase heat transfer and stabilize the temperature regime. This article examines the issue of determining the given modulus of elasticity of the hydraulic system of a volumetric hydraulic drive using the example of the experimental model of the TT4M-23L tracked crawler tractor and the relationship of the given modulus with pressure and temperature. An equation is calculated that allows establishing the relationship between pressure and the given modulus of elasticity of the hydraulic system.
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About journal
The magazine "Engineering, Energy, Transport AIC" is included in the list of scientific professional editions of Ukraine on technical sciences
(Category "Б", Order of the Ministry of Education and Science of Ukraine dated 02.07.2020 №886)
According to the decision of National Council of Television and Radio Broadcasting of Ukraine from 25.04.2024 No. 1337 the scientific journal «Engineering, Energy, Transport AIC» has the ID of the Media R30-05173.
The journal "Engineering, Energy, Transport AIC" is indexed according to the following databases and catalogs:
Certificate of state registration of mass media: No. 21906-11806 P dated 03/12/2016.
Founder of the journal: Vinnytsia National Agrarian University
Type of publication: journal
Kind of publication: scientific
Publication status: domestic
Year of foundation: 1997
Periodicity: 4 times per year
Volume: 18-20 conv. print. sheet (А4)
ISSN: 2520-6168 (print version), (online version)
Language of publication: (mixed languages) Ukrainian, English
The sphere of distribution and category of readers: national, foreign, faculty, scientists, entrepreneurs.
The periodical edition is included to the List of scientific professional publications of Ukraine on technical sciences, approved by order of the Ministry of Education and Science of Ukraine in 05.16.2016, No. 515.
The journal "Engineering, Energy, Transport AIC" is included in the "Catalog of Ukrainian Publications".
Subscription to the journal can be issued in each post office. The subscription index is 99720.
Technology, energy, agriculture transport AIC is a scholarly professional journal with a long-standing history and stable academic tradition, reflecting the evolution of engineering and technical sciences within the agro-industrial sector of Ukraine.
The journal was founded in 1997 under the title Bulletin of Vinnytsia State Agricultural Institute. According to the Resolution of the Presidium of the Higher Attestation Commission of Ukraine dated September 11, 1997, the publication obtained the status of a professional scientific journal, which enabled the publication of the main results of doctoral and candidate dissertations in technical sciences. From its inception, the journal positioned itself as an academic platform for addressing current issues of mechanization, electrification, and technical support of agricultural production.
During 2001–2014, the journal was published under the title Proceedings of Vinnytsia National Agrarian University. Series: Technical Sciences (State Registration Certificate of Print Media KV No. 16644-5116 PR dated April 30, 2010). Throughout this period, a systematic approach to the selection and peer review of scientific manuscripts was established, the thematic scope of publications was expanded, and continuity of scientific directions as well as the development of sectoral engineering schools was ensured.
Since 2015, the journal has been published under its current title, Technology, energy, agriculture transport AIC (State Registration Certificate No. 21906-11806 R dated March 12, 2016). The change of title reflected the expansion of the journal’s thematic coverage and its orientation toward interdisciplinary research in mechanical engineering, energy systems, electrical engineering, transport technologies, automation, and digital solutions for the agro-industrial complex.
The journal consistently adheres to the principles of open science. All published materials are distributed under the Creative Commons Attribution 4.0 International License (CC BY 4.0), ensuring open access to research results provided proper attribution to the authors and the original publication is maintained.
At present, Technology, energy, agriculture transport AIC is an authoritative professional scientific journal (Category B), providing a platform for the publication of fundamental and applied research results, promoting the integration of education, science, and industry, and contributing to the advancement of engineering and technological support of the agro-industrial complex of Ukraine.
